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Jue Hou¹, Madavan Raja Viswanath¹, Courtney Bauer¹, Mary P. McDougall^1,2, and Steven M. Wright^1,2
1Electrical and Computer Engineering, Texas A&M University, College Station, TX, United States, ²Biomedical Engineering, Texas A&M University, College station, TX, United States

Keywords: RF Arrays & Systems, System Imperfections: Measurement & Correction

 Frequency translation has been demonstrated to enable X-nuclear array coils on systems with only narrow-band 1H receivers. Mixing on receive only is preferred given the SAR monitoring on the transmit side, but requires additional phase correction to perform signal averaging. A post-processing phase correction method has been previously introduced by our group using the signals coupled from the local oscillators (LO) on the host system and translator. To avoid any post-processing and improve scanner throughput, we implement this correction method with hardware to detect and compensate the phase shift during the scan, which allows the signal averaging on the scanner.

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Lukas Hingerl¹, Bernhard Strasser¹, Gilbert Hangel^2,3, Stanislav Motyka¹, Fabian Niess¹, Eva Niess¹, Alexandra Lipka¹, Dario Goranovic¹, Philipp Lazen¹, Stephan Gruber², Siegfried Trattnig^2,4, and Wolfgang Bogner^1
1Department of Biomedical Imaging and Image-guided Therapy, Radiology and Nuclear Medicine, Medical University of Vienna, HFMR Centre, Vienna, Austria, ²HFMR Centre, Vienna, Austria, ³Department of Neurosurgery, Medical University of Vienna, Vienna, Austria, ⁴Institute for Clinical Molecular MRI in Musculoskeletal System, Karl Landsteiner Society, Vienna, Austria

Keywords: Shims, Magnets (B0)

Metamaterials enabling magnetic replicators for $$$B_0$$$ shimming as well as for transcranial magnetic stimulation may overcome traditional methods especially concerning locality of field manipulation, field enhancement or cancellation in the distance in real-time by current tuning.